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Does vitamin D protect against COVID-19?In the absence of a COVID-19 cure or vaccine, scientists are investigating whether vitamin D can reduce the risk of COVID-19 infection.
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Why vitamin C won't 'boost' your immune system against the coronavirusIt poses little risk but is very unlikely to help.
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Loss of smell could be a symptom of COVID-19Doctors are advising adding loss of smell to the list of symptoms for COVID-19.
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Severe COVID-19 may cause similar cognitive deficits as 20 years of agingPeople hospitalized for COVID-19 showed cognitive impairments.
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Longest COVID-19 infection reported: Patient had virus for 505 days.The case is the longest-known continuous infection with COVID-19 reported to date.
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Should you get a second booster shot for COVID-19?Is getting a second booster worth it?
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Quick guide: Most widely used COVID-19 vaccines and how they workLearn about the most widely used COVID-19 vaccines.
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At-home COVID-19 tests linked to accidental injuries, FDA warnsThe agency also reminded people to keep the tests out of reach of children and pets.
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'Stealth' omicron cases rising in the US: Here's what we know.BA.2 is steadily becoming more common in the U.S.
